安卓学习之学生签到APP（一）

 一、学生定位签到页面

具体实现步骤：

1.1 高德地图申请key

1、创建新应用

进入高德地图api控制台，创建一个新应用。如果您之前已经创建过应用，可直接跳过这个步骤。

2、添加新Key

在创建的应用上点击"添加新Key"按钮，在弹出的对话框中，依次：输入应用名名称，选择绑定的服务为“Android平台SDK”，输入发布版安全码  SHA1、调试版安全码 SHA1、及 Package，如下图所示：

 

附：SHA1码的获取

1.2 实现高德地图自动定位---准备工作

1、下载jar包，导入jar包

  首先去高德地图API官网下载好相关SDK jar文件，将下载的定位 SDK jar 文件复制到工程（此处截图以官方示例Demo为例子）的 libs 目录下，如果有老版本定位 jar 文件存在，请删除。

注：

• 第一个是2D地图的jar包，因为最后定位以后我要在地图上标出来位置
• 第二个是用于定位的jar包

对于每个jar文件，右键-选择Add As Library，导入到工程中。或者使用菜单栏 选择 File ->Project Structure->Modules-> Dependencies。点击绿色的加号选择File dependency. 然后选择要添加的jar包即可，此时build.gradle中会自动生成如下信息。 

  

2、配置AndroidMainfest.xml文件

<!-- 申请必要的权限-->
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
<uses-permission android:name="android.permission.READ_PHONE_STATE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_LOCATION_EXTRA_COMMANDS" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.CHANGE_WIFI_STATE" />

<application
        android:icon="@mipmap/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme"

        >
        <!--设置key-->
        <meta-data
            android:name="com.amap.api.v2.apikey"
            android:value="这里填写第一步你申请的那个key" />
        <!--声明定位service-->
        <service android:name="com.amap.api.location.APSService"></service>
</application>

3、Activity的布局文件

<com.amap.api.maps2d.MapView
        android:id="@+id/map_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent" >
    </com.amap.api.maps2d.MapView>

    <Button
        android:id="@+id/requet"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="签到"
        android:layout_alignParentTop="true"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true" />

4.

package com.cqvie.android_map;

import android.content.DialogInterface;
import android.icu.text.SimpleDateFormat;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.support.v7.app.AlertDialog;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.Toast;

import com.amap.api.location.AMapLocation;
import com.amap.api.location.AMapLocationClient;
import com.amap.api.location.AMapLocationClientOption;
import com.amap.api.location.AMapLocationListener;
import com.amap.api.maps2d.AMap;
import com.amap.api.maps2d.CameraUpdateFactory;
import com.amap.api.maps2d.LocationSource;
import com.amap.api.maps2d.MapView;
import com.amap.api.maps2d.UiSettings;
import com.amap.api.maps2d.model.BitmapDescriptorFactory;
import com.amap.api.maps2d.model.LatLng;
import com.amap.api.maps2d.model.MarkerOptions;
import com.cqvie.options.HttpUtilsHttpURLConnection;

import org.json.JSONException;
import org.json.JSONObject;

import java.util.Date;
import java.util.HashMap;
import java.util.Map;


public class MainActivity extends AppCompatActivity implements LocationSource, AMapLocationListener {

    private MapView mapView = null;
    private AMap aMap;
    private Button request;
    private AMapLocationClient mLocationClient;
    private AMapLocationClientOption mLocationOption;
    private OnLocationChangedListener mListener;
    //标识，用于判断是否只显示一次定位信息和用户重新定位
    private boolean isFirstLoc = true;
    String date=null;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //获取地图控件引用
        mapView = (MapView) findViewById(R.id.map_view);
        //在activity执行onCreate时执行mMapView.onCreate(savedInstanceState)，实现地图生命周期管理
        mapView.onCreate(savedInstanceState);
        //获取签到按钮
        request = (Button) findViewById(R.id.requet);

        init();
        //初始化定位
        mLocationClient = new AMapLocationClient(getApplicationContext());
        mLocationClient.setLocationListener(this);
        //初始化定位参数
        mLocationOption = new AMapLocationClientOption();
        // mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Device_Sensors);
        mLocationOption.setLocationMode(AMapLocationClientOption.AMapLocationMode.Hight_Accuracy);
        //设置是否返回地址信息（默认返回地址信息）
        mLocationOption.setNeedAddress(true);
        //设置是否只定位一次
        mLocationOption.setOnceLocation(true);
        //设置是否强制刷新WiFi
        mLocationOption.setWifiScan(true);
        //设置定位间隔,单位毫秒,默认为2000ms
        //mLocationOption.setInterval(2000);
        //给定位客户端对象设置定位参数
        mLocationClient.setLocationOption(mLocationOption);
        //启动定位
        mLocationClient.startLocation();
    }

    private void init() {
        if (aMap == null) {
            aMap = mapView.getMap();
            UiSettings settings = aMap.getUiSettings();
            aMap.setLocationSource(this);
            settings.setMyLocationButtonEnabled(true);
            aMap.setMyLocationEnabled(true);
        }
    }


    @Override
    protected void onDestroy() {
        super.onDestroy();
        //在activity执行onDestroy时执行mMapView.onDestroy()，实现地图生命周期管理
        mapView.onDestroy();
        //mLocationClient.stopLocation();
        mLocationClient.onDestroy();
    }

    @Override
    protected void onResume() {
        super.onResume();
        //在activity执行onResume时执行mMapView.onResume ()，实现地图生命周期管理
        mapView.onResume();
    }

    @Override
    protected void onPause() {
        super.onPause();
        //在activity执行onPause时执行mMapView.onPause ()，实现地图生命周期管理
        mapView.onPause();
    }

    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        //在activity执行onSaveInstanceState时执行mMapView.onSaveInstanceState (outState)，实现地图生命周期管理
        mapView.onSaveInstanceState(outState);
    }

    //    @RequiresApi(api = Build.VERSION_CODES.N)
    @Override
    public void onLocationChanged(final AMapLocation aMapLocation) {

        if (aMapLocation!=null){
            if (aMapLocation.getErrorCode()==0){
                //定位成功回调信息，设置相关消息
                aMapLocation.getLocationType();
                aMapLocation.getLatitude();//获取纬度
                aMapLocation.getLongitude();//获取经度
                aMapLocation.getAccuracy();//获取精度信息
                SimpleDateFormat df = new SimpleDateFormat("HH:mm:ss");
                Date nowdate = new Date(aMapLocation.getTime());
                date = df.format(nowdate);//定位时间
                aMapLocation.getAddress();//地址，如果option中设置isNeedAddress为false，则没有此结果，网络定位结果中会有地址信息，GPS定位不返回地址信息。
                aMapLocation.getCountry();//国家信息
                aMapLocation.getProvince();//省信息
                aMapLocation.getCity();//城市信息
                aMapLocation.getDistrict();//城区信息
                aMapLocation.getStreet();//街道信息
                aMapLocation.getStreetNum();//街道门牌号信息
                //aMapLocation.getBuildingId();//获取当前室内定位的建筑物Id
                //aMapLocation.getAccuracy();//获取精度信息
                aMapLocation.getPoiName();
                aMapLocation.getAoiName();

                //Log.d("why", String.valueOf(aMapLocation.getAoiName()));
//                if (isFirstLoc){
                //设置缩放级别
                aMap.moveCamera(CameraUpdateFactory.zoomTo(17));
                //将地图移动到定位点
                aMap.moveCamera(CameraUpdateFactory.changeLatLng(new LatLng(aMapLocation.getLatitude(), aMapLocation.getLongitude())));
                //点击定位按钮 能够将地图的中心移动到定位点
                mListener.onLocationChanged(aMapLocation);
                //获取定位信息
                final StringBuffer buffer = new StringBuffer();
                buffer.append(aMapLocation.getCountry() + ""
                        //+ aMapLocation.getProvince() + ""
                        + aMapLocation.getCity() + ""
                        // + aMapLocation.getProvince() + ""
                        + aMapLocation.getDistrict() + ""
                        + aMapLocation.getStreet() + ""
                        + aMapLocation.getStreetNum());


                Toast.makeText(getApplicationContext(), buffer.toString() + aMapLocation.getAoiName(), Toast.LENGTH_LONG).show();
                //Log.d("tzk",buffer.toString());

                isFirstLoc = false;
            }
        }
        else {
            Log.d("why", String.valueOf(aMapLocation.getErrorCode()));
            //显示错误信息ErrCode是错误码，errInfo是错误信息，详见错误码表。
            Log.e("AmapError", "location Error, ErrCode:"
                    + aMapLocation.getErrorCode() + ", errInfo:"
                    + aMapLocation.getErrorInfo());
            Toast.makeText(getApplicationContext(), "定位失败", Toast.LENGTH_LONG).show();
        }

        request.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                new AlertDialog.Builder(MainActivity.this)
                        .setTitle("签到")
                        .setMessage(date+ "
" + aMapLocation.getAoiName())
                        .setPositiveButton("确定？", new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialogInterface, int i) {
                                //新页面接收数据
                                Bundle bundle = MainActivity.this.getIntent().getExtras();
                                //接收name值
                                String name = bundle.getString("name");
                                //Toast.makeText(MainActivity.this,date,Toast.LENGTH_LONG).show();
                                signClickListen(date,name,aMapLocation.getAoiName());

                            }
                        })
                        .show();
            }
        });
    }

    //激活定位
    @Override
    public void activate(OnLocationChangedListener onLocationChangedListener) {
        mListener = onLocationChangedListener;
    }

    @Override
    public void deactivate() {
        mListener = null;
    }

    /**
     * 签到点击事件
     */
    public void signClickListen(final String date,final  String name,final String signaddress) {
        new Thread(new Runnable() {
            @Override
            public void run() {
                String url = HttpUtilsHttpURLConnection.BASE_URL + "/SignServlet";
                Map<String, String> params = new HashMap<String, String>();
                Message msg = new Message();
                Bundle data = new Bundle();
                params.put("signtime",date);
                params.put("name", name);
                params.put("signaddress", signaddress);
                String result = HttpUtilsHttpURLConnection.getContextByHttp(url, params);
                msg.what = 0x12;
                data.putString("result", result);
                msg.setData(data);
                hander.sendMessage(msg);
            }
            Handler hander = new Handler() {
                @Override
                public void handleMessage(Message msg) {
                    if (msg.what == 0x12) {
                        Bundle data = msg.getData();
                        String key = data.getString("result");//得到json返回的json
//                                   Toast.makeText(MainActivity.this,key,Toast.LENGTH_LONG).show();
                        try {
                            JSONObject json = new JSONObject(key);
                            String result = (String) json.get("result");
                            if ("success".equals(result)) {
                                Toast.makeText(MainActivity.this,name + "签到成功！", Toast.LENGTH_SHORT).show();

                            } else if ("error".equals(result)) {
                                Toast.makeText(MainActivity.this,name + "签到失败！", Toast.LENGTH_SHORT).show();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                }
            };
        }).start();
    }
}